Question

I’m trying to figure out how to set up a project using ant. For some reason, I can’t get the junit tests to run. I set up a simple dummy project using ant to try and figure this out. All it has is a single unit test that should pass trivially.

My project structure looks like this.

.
|-- build.xml
|-- src
`-- test
    |-- foo
    |   `-- MainTest.java
    `-- junit-4.10.jar

MainTest.java looks like this.

package foo;

import org.junit.*;
import static org.junit.Assert.*;

public class MainTest {
    @Test
    public void passes() {
        System.out.println("It works!");
    }
}

And here is build.xml.

<project name="Nes" default="build" basedir=".">
    <target name="build-test">
        <javac srcdir="test">
            <classpath>
                <pathelement location="test/junit-4.10.jar" />
            </classpath>
        </javac>
    </target>

    <target name="test" depends="build-test">
        <junit>
            <classpath>
                <pathelement location="test/junit-4.10.jar" />
            </classpath>
            <batchtest>
                <fileset dir="test" includes="foo/MainTest.class" />
            </batchtest>
        </junit>
    </target>
</project>

Here’s the output I get from running ant test.

Buildfile: /home/hayden/dev/nes/build.xml

build-test:
    [javac] /home/hayden/dev/nes/build.xml:4: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

test:
    [junit] Test foo.MainTest FAILED

BUILD SUCCESSFUL
Total time: 0 seconds

I’m running ant 1.8.2 and Java 6.

What am I doing wrong?

Answer 1

You need to add a path to the actual .class file so JUnit can actually run the test. Since you are fully qualifying the test class name, you need to include the directory that contains the foo package:

<target name="test" depends="build-test">
    <junit>
        <classpath>
            <pathelement location="test/junit-4.10.jar" />
            <pathelement location="test" />
        </classpath>

But I’d recommend that you change the javac task to not output build artifacts (i.e. .class files) into the same directory as your source files. Create a top-level “build” directory and put all your build output in there.

You should also quiet the first warning by adding a includeantruntime attribute to the javac task:

    <javac srcdir="test" includeantruntime="false">